# opkhelper
# lib/messages
# Functions for printing error and warning messages.
#
# Copyright (C) 2012 Patrick "P. J." McDermott
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

[ -n "${_OH_MESSAGES_SH}" ] && return 0
_OH_MESSAGES_SH=true

. @@LIBDIR@@/locale

# TODO: Which of these should print to the standard error stream – just
# oh_error() and oh_warn()?

oh_error()
{
	printf '%s: Error: ' "${0##*/}"
	printf "${@}"
	printf '\n'
	exit 1
}

oh_warn()
{
	printf '%s: Warning: ' "${0##*/}"
	printf "${@}"
	printf '\n'
	return 0
}

oh_info()
{
	printf '%s: ' "${0##*/}"
	printf "${@}"
	printf '\n'
	return 0
}

oh_usage()
{
	_util="$(echo "${0##*/}" | sed 's/-/_/g')"

	# Prevent field splitting in the evaluated echo command.
	_old_ifs="${IFS}"
	IFS=
	_usage_str="$(eval echo \$\{oh_str_usage_"${_util}"\})"
	IFS="${_old_ifs}"

	: "${_usage_str:=${oh_str_usage_none}}"
	printf '%s\n' "${_usage_str}"
}

oh_help()
{
	_util="$(echo "${0##*/}" | sed 's/-/_/g')"

	# Prevent field splitting in the evaluated echo command.
	_old_ifs="${IFS}"
	IFS=
	_help_str="$(eval echo \$\{oh_str_help_"${_util}"\})"
	IFS="${_old_ifs}"
	: "${_help_str:=${oh_str_help_none}}"

	oh_usage
	printf '%s\n' "${_help_str}"
}

oh_version()
{
	printf "${oh_str_version}\n" \
		"${0##*/}" '@@PACKAGE_NAME@@' '@@PACKAGE_VERSION@@'
}